[FEATURE] Add email to website & README

[awpala]

Is your feature request related to a problem? Please describe.
Currently, there is no public visibility to the group email contact.

Describe the solution you'd like
Add an email icon to the navbar linking to gt.omshub@gmail.com, as well as corresponding entry near the top of README.md

Describe alternatives you've considered
(N/A)

Additional context
(N/A)

[Udassi-Pawan]

Hey @awpala,
I would like to work on this issue, would you assign it to me?

[awpala]

@Udassi-Pawan please feel free to self-assign (i.e., generally speaking, not just restricted to this particular Issue), we're not super strict here in general with formalities / "parliamentary procedures"...furthermore, there should be no restrictions set against PR'ing from forked branches, either.

However, if you do run into issues with self-assign and/or PR'ing, please let me know so I can resolve accordingly. Thanks!